Identification of a locus associated with genic male sterility in maize via EMS mutagenesis and bulked-segregant RNA-seq

文献类型： 外文期刊

第一作者： Shi, Zi

作者： Shi, Zi;Ren, Wen;Zhao, Yanxin;Wang, Xiaqing;Zhang, Ruyang;Su, Aiguo;Wang, Shuai;Li, Chunhui;Wang, Jiarong;Wang, Shuaishuai;Zhang, Yunxia;Ji, Yulong;Song, Wei;Zhao, Jiuran

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关键词： Genic male sterility; EMS-induced mutant; BSR-seq; bHLH51; Maize

期刊名称：CROP JOURNAL （ 影响因子：4.647； 五年影响因子：5.781 ）

ISSN： 2095-5421

年卷期： 2021 年 9 卷 6 期

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收录情况： SCI

摘要： Genic male sterility (GMS) is one of the most important resources for exploiting heterosis in crop breeding, so that identifying genomic loci regulating GMS is desirable. However, many regulatory genes controlling GMS have not yet been characterized in maize, owing partly to a lack of genetic materials. We generated a recessive male-sterile maize mutant in the Jing 724 genetic background via ethyl methane-sulfonate treatment, and found the male sterility to be due to a single gene mutation. Bulk-segregant RNA sequencing of three replicates indicated that one genomic region located at the end of chromosome 4 was associated with the observed mutant phenotype. Among genes with nonsynonymous mutations, Zm00001d053895 (bHLH51) showed abolished expression in the sterile bulks and was annotated as a bHLH transcription factor orthologous to Arabidopsis AMS, suggesting an association with the male sterility of the mutant. Kompetitive Allele-Specific PCR assays further validated the exclusive correlation of male sterility with the single C-to-T mutation in the fifth exon. The new maize mutant and the potential SNP locus provide novel genetic material for investigating the molecular mechanism underlying tapetal development and may facilitate the improvement of hybrid production systems. (C) 2020 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.

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